I loved the gameplay. The mechanic of bashing your head against the wall (btw, why is there blood particles?!) allows for some clever level design, and I think if you decide to work on the game further you can have almost infinite ideas for the levels, especially if you add different gameplay elements. I also loved the music, it was very nice and charming. My only minor complaint is that I wish I could just press R and restart the level instead of having to go back to menu, and also I wish beating the level would just send me to the next one straight away, instead of, again, having to go back to menu. Nevertheless, great game!